The Banded Ground-cuckoo (Neomorphus radiolosus) is a rare, endangered, and poorly known species endemic to the Chocó Biogeographic Zone. We summarize 7 months of data from radio tracking an adult in northwestern Ecuador. Home range estimates were 42.2 ha (minimum convex polygon) and 49.9 ha (95% kernel analysis); the core area was 3.4 ha (50% kernel analysis). The bird favored undisturbed habitat and avoided secondary forest. It was primarily insectivorous and rarely associated with army ants (Eciton sp.) and not with mammals. Breeding occurred from March through June and the marked bird was seen with an unmarked individual throughout the study. The Banded Ground-cuckoo has a large home range, limited dispersal ability, and apparently depends on undisturbed forest. Deforestation and habitat fragmentation appear to be the gravest threats facing the species.